001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 * 017 */ 018 019 package org.apache.commons.exec; 020 021 import java.io.IOException; 022 import java.io.InputStream; 023 import java.io.OutputStream; 024 025 /** 026 * Used by <code>Execute</code> to handle input and output stream of 027 * subprocesses. 028 */ 029 public interface ExecuteStreamHandler { 030 031 /** 032 * Install a handler for the input stream of the subprocess. 033 * 034 * @param os 035 * output stream to write to the standard input stream of the 036 * subprocess 037 */ 038 void setProcessInputStream(OutputStream os) throws IOException; 039 040 /** 041 * Install a handler for the error stream of the subprocess. 042 * 043 * @param is 044 * input stream to read from the error stream from the subprocess 045 */ 046 void setProcessErrorStream(InputStream is) throws IOException; 047 048 /** 049 * Install a handler for the output stream of the subprocess. 050 * 051 * @param is 052 * input stream to read from the error stream from the subprocess 053 */ 054 void setProcessOutputStream(InputStream is) throws IOException; 055 056 /** 057 * Start handling of the streams. 058 */ 059 void start() throws IOException; 060 061 /** 062 * Stop handling of the streams - will not be restarted. 063 */ 064 void stop(); 065 }